OpenStudy (anonymous):

Two restaurants have rooms to rent for dinner parties. One restaurant charges $100 to rent a room and $20 per person. The other restaurant charges $25 to rent the room and $25 per person. Which of the following is then number of people for which the cost of a dinner party would be the same at both restuarants? a. 25 b. 15 c. 20 d. 10